423440120 has 64 divisors (see below), whose sum is σ = 1001160000. Its totient is φ = 160872448.

The previous prime is 423440119. The next prime is 423440123. The reversal of 423440120 is 21044324.

It is a super-2 number, since 2×423440120² = 358603070451228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 423440092 and 423440101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423440123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135536 + ... + 138624.

It is an arithmetic number, because the mean of its divisors is an integer number (15643125).

Almost surely, 2^423440120 is an apocalyptic number.

423440120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423440120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500580000).

423440120 is an abundant number, since it is smaller than the sum of its proper divisors (577719880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423440120 is a wasteful number, since it uses less digits than its factorization.

423440120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272 (or 3268 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 423440120 is about 20577.6607028107. The cubic root of 423440120 is about 750.9263339214.

Adding to 423440120 its reverse (21044324), we get a palindrome (444484444).

The spelling of 423440120 in words is "four hundred twenty-three million, four hundred forty thousand, one hundred twenty".